The first inventory of the spider fauna of the Lut Desert, known as one of the hottest deserts in the world, is provided. Spiders collected during the Iranian Biological Expedition in November 2016 are reported. We identified 15 species belonging to 12 families, including the new species, Oecobius fahimii sp. n. (female, Oecobiidae), which is described and illustrated here. In addition, three species – Devade tenella (Tyshchenko 1965) (Dictynidae), Gnaphosa ukrainica Ovtsharenko, Platnick et Song 1992 and Haplodrassus caspius Ponomarev et Belosludtsev 2008 (both Gnaphosidae) – are reported from Iran for the first time.
The male of Coelotes nasensis Shimojana 2000 is described for the first time on the basis of the topotypic specimen from Amami-ōshima Island in the Ryukyu Islands, southwestern Japan. The male specimen of the species is characterized by having a large and elongated median apophysis in palp. Furthermore, molecular analysis based on the mt-DNA COI region revealed that identity between a female topotype and a male specimen was highly similarlity.
Salticus latidentatus Roewer 1951, which is distributed in Mongolia, Russia and China, is recorded
in Japan for the first time. In Japan the distribution is currently confined to Osaka and Hyogo. We redescribe
S. latidentatus based on the holotype and additional specimens from Japan.
A new species of Cyclosa is described under the name of Cyclosa bulla n. sp. using specimens collected from Thailand, Singapore and Brunei. Females of the species can be easily distinguished from other congeners by the shape of the abdomen, which has a globose posterior end. In contrast, males cannot be distinguished from those of Cyclosa bifida, which seems to be the most closely related species, even by the shape of the palpal organ. In this study, male specimens are identified by DNA barcoding.